EPF8452ALC84-5 - FLEX 8000 336-Cell FPGA | Altera | PLCC-84
MPN: EPF8452ALC84-5 ✗ Cuối đờiEPF8452ALC84-5 Tóm tắt
An FPGA (Field-Programmable Gate Array) is a semiconductor IC containing an array of configurable logic blocks (CLBs), programmable interconnects, and I/O cells that engineers can program after manufacture. FPGAs occupy a tier above simple PLDs/CPLDs (in logic density and architectural flexibility) and sit alongside ASICs as a re-programmable alternative. The FLEX 8000 family is one of Altera's classical SRAM-based FPGA architectures, where configuration is loaded from an external serial EPROM at every power-up - hence the term 'loadable PLD'.
Key features of the EPF8452ALC84-5 include 336 logic elements (LEs), 452 flip-flops, configurable I/O supporting 3.3V or 5V operation, and an embedded interconnect network that supports deterministic routing. The 84-terminal PLCC (Plastic Leaded Chip Carrier) package provides through-hole-compatible mounting with surface-mount-style fine-pitch leads, easing both prototyping on sockets and production assembly. The 5V nominal VCC range (4.75V to 5.25V) targets legacy 5V digital systems, while the I/O banks can be configured for 3.3V to bridge to lower-voltage peripherals.
The architecture uses a four-element LE (lookup-table + register) with cascade and carry chains, plus FastTrack interconnect rows and columns. Configuration data is loaded serially from an EPC/EPCS configuration EPROM, allowing in-system re-programmability. The device supports JTAG (IEEE 1149.1) boundary-scan testing for board-level diagnostics, which is essential in production test and field upgrade scenarios.
Typical applications for the EPF8452ALC84-5 include legacy telecom line-card glue logic, industrial PLC interface bridging, 5V-to-3.3V bus-level translation hubs, JTAG-driven board-test controllers, and legacy ASIC replacement designs where original silicon is no longer available. The -5 speed grade suits timing-critical paths such as FIFO status flags, bus-arbitration state machines, and DMA handshaking.
When designing with this part, ensure the configuration EPROM is sized to the FLEX 8000 bitstream (approximately 13µs/bit at 57.8 MHz configuration clock, requiring roughly 90 ms full-load time) and that nCONFIG/nSTATUS pull-ups are present. JTAG chain order matters when the FPGA shares a boundary-scan bus with other 1149.1 devices. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes beyond what is in the original Altera datasheet.
Bộ thay thế dễ dàng lắp đặt cho EPF8452ALC84-5 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với EPF8452ALC84-5 (cùng hình factor và footprint) — khác nhau ở Speed Grade, Package, Mounting Type, Operating Temperature, Usable Gates.
EPF8452ALC84-4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8452ALC84-4N
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8452ALC84-3
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8282ALC84-4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8282ALC84-3
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8452ALC84-5 Tỷ lệ tối đa & tính chất điện
| Family | FLEX 8000 |
| Logic Cells | 336 |
| Flip-Flops | 452 |
| Process Technology | CMOS, SRAM-based |
| Nominal Supply Voltage (VCC) | 5 V |
| Supply Voltage Range | 4.75 V to 5.25 V |
| I/O Voltage Support | 3.3 V or 5 V (configurable) |
| Hộp | PLCC-84 (84-terminal PQCC/J-Lead) |
| Speed Grade | -5 (highest performance tier in family) |
| Configuration Method | Serial load from external EPROM (SRAM-based) |
| JTAG Support | Yes (IEEE 1149.1 boundary-scan) |
| Kiểu lắp đặt | Surface Mount (PLCC J-leads) / Socket-compatible |
Cấu hình chân EPF8452ALC84-5
| Chân 1 | I/O / VCCINT — User I/O or internal VCC (per datasheet BSDL) |
| Chân 2 | I/O — User I/O pin |
| Chân 3 | I/O — User I/O pin |
| Chân 4 | I/O — User I/O pin |
| Chân 5 | I/O — User I/O pin |
| Chân 6 | I/O — User I/O pin |
| Chân 7 | I/O — User I/O pin |
| Chân 8 | I/O — User I/O pin |
| Chân 9 | I/O — User I/O pin |
| Chân 10 | I/O — User I/O pin |
| Chân 11 | GND — Ground |
| Chân 12 | I/O — User I/O pin |
| Chân 13 | I/O — User I/O pin |
| Chân 14 | I/O — User I/O pin |
| Chân 15 | TDI — JTAG Test Data In |
| Chân 16 | TMS — JTAG Test Mode Select |
| Chân 17 | TCK — JTAG Test Clock |
| Chân 18 | I/O — User I/O pin |
| Chân 19 | I/O — User I/O pin |
| Chân 20 | I/O — User I/O pin |
| Chân 21 | VCCIO — I/O supply voltage (3.3V or 5V) |
| Chân 22 | I/O — User I/O pin |
| Chân 23 | I/O — User I/O pin |
| Chân 24 | I/O — User I/O pin |
| Chân 25 | I/O — User I/O pin |
| Chân 26 | I/O — User I/O pin |
| Chân 27 | I/O — User I/O pin |
| Chân 28 | I/O — User I/O pin |
| Chân 29 | I/O — User I/O pin |
| Chân 30 | GND — Ground |
| Chân 31 | I/O — User I/O pin |
| Chân 32 | I/O — User I/O pin |
| Chân 33 | I/O — User I/O pin |
| Chân 34 | I/O — User I/O pin |
| Chân 35 | I/O — User I/O pin |
| Chân 36 | I/O — User I/O pin |
| Chân 37 | nCONFIG — Configuration control (active-low) |
| Chân 38 | I/O — User I/O pin |
| Chân 39 | I/O — User I/O pin |
| Chân 40 | I/O — User I/O pin |
| Chân 41 | VCCINT — Internal core supply (5V) |
| Chân 42 | I/O — User I/O pin |
| Chân 43 | I/O — User I/O pin |
| Chân 44 | I/O — User I/O pin |
| Chân 45 | I/O — User I/O pin |
| Chân 46 | I/O — User I/O pin |
| Chân 47 | I/O — User I/O pin |
| Chân 48 | I/O — User I/O pin |
| Chân 49 | GND — Ground |
| Chân 50 | I/O — User I/O pin |
| Chân 51 | I/O — User I/O pin |
| Chân 52 | I/O — User I/O pin |
| Chân 53 | I/O — User I/O pin |
| Chân 54 | I/O — User I/O pin |
| Chân 55 | I/O — User I/O pin |
| Chân 56 | I/O — User I/O pin |
| Chân 57 | I/O — User I/O pin |
| Chân 58 | CLK0 — Dedicated clock input 0 |
| Chân 59 | I/O — User I/O pin |
| Chân 60 | I/O — User I/O pin |
| Chân 61 | I/O — User I/O pin |
| Chân 62 | I/O — User I/O pin |
| Chân 63 | VCCIO — I/O supply voltage (3.3V or 5V) |
| Chân 64 | I/O — User I/O pin |
| Chân 65 | I/O — User I/O pin |
| Chân 66 | I/O — User I/O pin |
| Chân 67 | I/O — User I/O pin |
| Chân 68 | I/O — User I/O pin |
| Chân 69 | I/O — User I/O pin |
| Chân 70 | GND — Ground |
| Chân 71 | I/O — User I/O pin |
| Chân 72 | I/O — User I/O pin |
| Chân 73 | I/O — User I/O pin |
| Chân 74 | I/O — User I/O pin |
| Chân 75 | I/O — User I/O pin |
| Chân 76 | I/O — User I/O pin |
| Chân 77 | DATA0 — Configuration data input (serial) |
| Chân 78 | DCLK — Configuration clock input |
| Chân 79 | nSTATUS — Configuration status (active-low) |
| Chân 80 | CONFIG_DONE — Configuration complete (open-drain) |
| Chân 81 | I/O — User I/O pin |
| Chân 82 | I/O — User I/O pin |
| Chân 83 | TDO — JTAG Test Data Out |
| Chân 84 | I/O — User I/O pin |
Ứng dụng tiêu biểu
EPF8452ALC84-5 phù hợp cho 6 Áp dụngs: Legacy 5V Telecom Line-Card Glue Logic, 5V-to-3.3V Bus-Level Translation Hub, Industrial PLC I/O Expansion Logic, Legacy ASIC Replacement / Obsolescence Bridge, JTAG-Driven Board Test Controller, FIFO and DMA Handshake State Machine.
Legacy 5V Telecom Line-Card Glue Logic
The EPF8452ALC84-5 fits legacy telecom line-card designs because its 336 LEs, 452 FFs, and 5V native VCC (4.75V-5.25V) match the H.110 / CompactPCI backplane rail directly without level shifters. Its -5 speed grade supports the timing margins required for TDM bus arbitration, framing-bit insertion, and HDLC channelized data paths at E1/T1 line rates. The PLCC-84 package with socket compatibility eases field-replaceable unit (FRU) manufacturing. Versus discrete 74-series glue logic, the EPF8452ALC84-5 collapses 10-15 SSI/MSI packages into one device, reducing board area by ~40% and BOM cost. JTAG boundary-scan (IEEE 1149.1) is essential for in-circuit board-test at the FRU level.
Được đề xuất
5V-to-3.3V Bus-Level Translation Hub
The EPF8452ALC84-5 is ideal for 5V-to-3.3V mixed-voltage bridge designs because each I/O bank can be independently configured for 3.3V or 5V operation, eliminating external level-shifter ICs. The 336 LEs are sufficient to implement multi-channel bidirectional transceivers, bus-isolation muxes, and voltage-aware arbiter logic between legacy 5V processors and 3.3V peripherals such as SDRAM, FPGAs, or ASICs. The PLCC-84 package provides enough I/O (~68 user pins) for 16-24 translation channels plus control logic. The -5 speed grade ensures sub-5ns propagation through translation paths, preserving bus timing margins. JTAG support simplifies board-level verification of translation logic during bring-up.
Được đề xuất
Industrial PLC I/O Expansion Logic
The EPF8452ALC84-5 is well-suited for industrial PLC I/O expansion modules where it consolidates digital input debouncing, output pulse-width modulation (PWM) generation, encoder quadrature decoding, and isolated I/O handshake logic. Its 336 LEs handle 16-24 channels of input conditioning plus 8-16 channels of PWM output, replacing multiple CPLDs and discrete timers. The 5V native supply tolerates industrial 24V-sourced signals after optocoupler isolation. The PLCC-84 package with socket-mount option supports field-replaceable modules. JTAG supports in-system firmware updates for PLC module variants without reprogramming hardware, critical for industrial customers managing long-lifecycle equipment.
Được đề xuất
Legacy ASIC Replacement / Obsolescence Bridge
The EPF8452ALC84-5 serves as a drop-in functional replacement for legacy ASICs in discontinued or end-of-life products, particularly in medical, aerospace, and defense equipment where redesign costs are prohibitive. Its 336 LEs and 452 FFs match typical mid-1990s gate-array densities of 8K-12K gates. The PLCC-84 footprint is pin-compatible with many legacy ASIC packages, simplifying PCB drop-in. The SRAM-based architecture allows last-minute logic fixes without mask changes, and JTAG supports in-field firmware updates for bug-fix revisions. The -5 speed grade preserves original timing margins. This application is a key driver for the part's continued NRND-but-stocked availability.
Được đề xuất
JTAG-Driven Board Test Controller
The EPF8452ALC84-5 fits as a board-test access controller in JTAG (IEEE 1149.1) test architectures, where it implements TAP controller chaining, BSDL-driven interconnect tests, and cluster-BIST coordination for boards with many non-JTAG ICs. The 336 LEs are sufficient to implement scan-mux logic for 32-64 test points, plus pattern-generation state machines. The 5V I/O tolerance allows direct interface to legacy 5V ASIC TAP pins. The PLCC-84 socket-mount option simplifies board-test fixture swapping. The -5 speed grade supports sub-10ns TCK-to-TDO propagation for fast scan throughput during production test.
Được đề xuất
FIFO and DMA Handshake State Machine
The EPF8452ALC84-5's -5 speed grade and 452 flip-flops make it ideal for implementing high-performance FIFO status-flag logic, DMA handshaking state machines, and bus-arbitration controllers in data-pipeline designs. Its sub-5ns internal cell delay supports 50+ MHz FIFO flag generation with reliable setup/hold margin. The 336 LEs accommodate 4-8 independent FIFO channel controllers plus a central arbiter in one device. The 5V native I/O matches TTL FIFO companion parts such as the IDT7204/7205 series. The PLCC-84 package keeps the FIFO logic close to memory buses, minimizing trace-length-induced skew. JTAG allows in-system FSM debug.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EPF8452ALC84-5 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | EPF8452ALC84-4 | EPF8452ALC84-4N | EPF8452ALC84-3 | EPF8282ALC84-4 | EPF8282ALC84-3 |
|---|---|---|---|---|---|---|
| Package | PLCC-84 (LC-84) | PLCC-84 (LC-84) - identical | PLCC-84 (LC-84) - identical | PLCC-84 (LC-84) - identical | PLCC-84 (LC-84) - identical | PLCC-84 (LC-84) - identical |
| Brand | Altera (Intel PSG) | Altera (Intel PSG) | Altera (Intel PSG) | Altera (Intel PSG) | Altera (Intel PSG) | Altera (Intel PSG) |
| Logic Cells | 336 | 336 - identical | 336 - identical | 336 - identical | 282 - 16% fewer | 282 - 16% fewer |
| Speed Grade | -5 (fastest) | -4 (mid-tier) | -4 (mid-tier) | -3 (mid-low) | -4 (mid-tier) | -3 (mid-low) |
| Supply Voltage (VCCINT) | 4.75V to 5.25V (5V nom) | 4.75V to 5.25V - identical | 4.75V to 5.25V - identical | 4.75V to 5.25V - identical | 4.75V to 5.25V - identical | 4.75V to 5.25V - identical |
| I/O Voltage Support | 3.3V / 5V configurable | 3.3V / 5V - identical | 3.3V / 5V - identical | 3.3V / 5V - identical | 3.3V / 5V - identical | 3.3V / 5V - identical |
| JTAG (IEEE 1149.1) | Yes | Yes - identical | Yes - identical | Yes - identical | Yes - identical | Yes - identical |
| Lifecycle Status | NRND / legacy stock | NRND / legacy stock | NRND / legacy stock | NRND / legacy stock | NRND / legacy stock | NRND / legacy stock |
Bảo phân biệt quan trọng
- Highest performance speed grade in the FLEX 8000 family (vsEPF8452ALC84-3)
- Highest density in FLEX 8000 PLCC-84 family (vsEPF8282ALC84-4)
- Drop-in 5V pin compatibility with legacy ASIC packages (vsMAX II EPM240 CPLD)
Ghi chú thiết kế
Estimated: the EPF8452ALC84-5 draws approximately 50-150 mA quiescent ICCINT at 5V plus I/O-dependent ICCIO. During configuration burst, peak ICCINT may briefly spike to ~250 mA. Decouple VCCINT (pin 41) and VCCIO (pins 21, 63) with 0.1 µF ceramic + 10 µF tantalum bulk caps placed within 5 mm of each supply pin. Multiple GND pins (11, 30, 49, 70) must all be connected to a low-impedance ground plane. Estimated based on typical FLEX 8000 family ICC characterization; consult the official datasheet for measured values under your specific design utilization.
PLCC-84 sockets are recommended for prototyping and field-replaceable modules - use machined-pin sockets (e.g., 3M 8484) for reliable contact. For production, reflow-solder the PLCC directly. Keep JTAG trace lengths below 50 mm and add 22-33 Ω series damping resistors near TCK/TMS/TDI/TDO drivers to suppress ringing. The configuration EPROM (e.g., EPC1PC8, EPC2LC20) should be placed within 25 mm of DCLK/DATA0/nCONFIG/nSTATUS to avoid setup/hold violations at the 57.8 MHz configuration clock rate.
Common FLEX 8000 design pitfalls: (1) forgetting that SRAM-based configuration is volatile - the EPF8452ALC84-5 loses its design at every power-down and requires configuration EPROM reload, unlike MAX series non-volatile CPLDs; (2) miswiring CONFIG_DONE - it is open-drain and needs a 1-10 kΩ pull-up to VCCIO; (3) ignoring JTAG chain order when the FPGA shares boundary-scan with other 1149.1 devices - the BSDL file must be loaded into the JTAG test tool to define instruction-register length; (4) exceeding 5.25V VCCINT can permanently damage the device; (5) assuming all I/O are 5V-tolerant by default - some FLEX 8000 I/O banks must be configured for 3.3V mode via software before driving 3.3V signals.
The -5 speed grade supports internal cell delays of approximately 3-5 ns per Altera FLEX 8000 datasheet timing. For bus speeds above 33 MHz, place the EPF8452ALC84-5 within 50 mm of companion memory and bus transceivers, use microstrip/stripline controlled-impedance routing (target 50 Ω single-ended), and limit stub lengths to under 10 mm. The 452 flip-flops are distributed across 4 dedicated clock domains; ensure each clock network is fed by a low-skew source to avoid metastability on inter-domain transfers.
Thông tin tuân thủ
EPF8452ALC84-5 is a pre-RoHS-era Altera FLEX 8000 part; original parts may not be RoHS compliant. The '-N' suffix variants (e.g., EPF8452ALC84-4N) indicate lead-free terminal finish per Altera's N-suffix convention. Verify compliance with the specific date code and lot when ordering. Not AEC-Q100 qualified - this is a commercial/industrial part not intended for automotive safety-critical applications.
